Consider the following statements I. Flame cells are excretory structures in flatworms II. Green glands are excretory organs in annelids III. Columns of Bertini are the extensions of the renal cortex into the renal medulla between the renal pyramids.

 Consider the following statements

I. Flame cells are excretory structures in flatworms
II. Green glands are excretory organs in annelids
III. Columns of Bertini are the extensions of the renal cortex into the renal medulla between the renal pyramids.

Consider the following statements
I. Flame cells are excretory structures in flatworms
II. Green glands are excretory organs in annelids
III. Columns of Bertini are the extensions of the renal cortex into the renal medulla between the renal pyramids.

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